If surfaces overlap one another can a solid be formed if the surfaces enclose a solid
Unfortunately you'll need to trim the excess surfacing off using the trim tool, then use the "Knit Surface" command.
When using the "Knit Surface", you'll have an option to create a solid body if your surfaces are "Water-tight"; seamed properly.
If the option is not available, there is something wrong with your geometry.
"Pierce Point" relations are your best friend making solids from surfaces.
Hope this helps :)
yeah I have a lot of surfaces thats why I was looking for a quicker way thanx anyway
SW requires you to have a closed surface in order to make it a solid body so you can't!